We Can’t Imagine the Wonders to Come

An Italian inventor has developed a huge three-dimensional printer that can print entire buildings out of sand and an inorganic binder.

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Genius Serving the Poor

MIT’s Guru of Low-Tech Engineering Fixes the World on $2 a Day

From impoverished Peruvian villages to MIT’s D-Lab, professor Amy Smith and her spirited team of engineers are on a mission: Fight global poverty and improve living standards for developing countries — one low-cost, accessible invention at a time.